Tool holder for metal planers



Aug. 21, 1928. 1,681,408

c. G. JOHANNESMEYER ET AL 9 TOOL HOLDER FOR METAL PLANERS Filed Nov. 17,1923 2 sheets-sheet 1 37 /;g =10 :6 l zyvsN-rak CHARLES GGTORGEJOHANNEfiljEYER Amman R: M 6mm Aug. 21, 1928. 1,681,408

C. G. JOHANNESMEYER ET AL TOOL HOLDER FOR METAL PLANERS Filed NOV. 17,1925 2 Sheets-Sheet 2 /N VEA/ TOR CHARLES GEORGE JouANNEsMeYER ALFRED B.M CANN flTTOE/VEY Patented Aug. 21, 1928.

UNITED STATES PATENT orl-"ica.

CHARLES GEORGE JOHANNESMEYER, OF GLENDALE, AND ALFRED R. MCCANN, OI

HAMILTON, OHIO, ASSIGNORS TO THE LIBERTY HAMILTON, OHIO, A CORPORATIONOF OHIO.

MACHINE TOOL COMPANY, 01'

TOOL HOLDER FOR METAL PLANERS.

Application filed November 17, 1923.

Our invention relates to a novel metal planer.

It is well known that the vibration (commonly referred to as chatter) ofa metal cutting tool is caused by insuflicient stability of the tool inthe support or holder thereof. It Is generally and especiallyadvantageous to provide a holder for a tool of this character having aminimized adaptability to chatter. A cut of considerable depth may thenbe accomplished without the likelihood of excessive damage to themechanism of the planer as well as with the capability of producing afinished product free from indentations and roughened surface in theshortest space oftime, thereby, producing a highly eflicient article ata low cost of manufacture.

The objects of our invention are to provide a tool holder for metalplaners especially adapted to eliminate vibration whereby the tool iscapable of taking a cut of considerable depth in the material withoutdeveloping the highly objectionable chatter; to provide a tool holderfor metal planers capable, of producing a finished product having anexceptionally smooth surface irrespective of the depth of the cut; toprovide a tool holder for metal planers conveniently adjusted to permitpositioning thetool relative to the work for the purpose of finishingthe work at an angle to the planer table.

Our invention consists in a clapper box having a hinged tool blockthereon and pivotally connected to the tool slide and provided with anarc rack at the upper end thereof meshing with a worm gear adapted tomanual actuation for the purpose of ad justing said clapper box to adesired angle and secured in position by nuts threaded to bolts fixed tothe tool slide and extending through arc slots in the upper part of theclapper box; further, in a conical guide fixed to the hinged tool blockand adapted to seat into a recess of like shape formed in the clapperbox; further, in combination with a hinged tool block having a channeled1nner surface adapted to snugly fit a rabbeted surface of the clapperbox when the tool block is in closed position; and, further, in acylindrical nut threaded to a p111 adapted Serial No. 675,409.

to act as a pivot for adjustment of the clapper box.

Our invention also consists in the construction, combination andarrangement of parts as herein set forth and claimed.

In the drawings:

Fig. 1 is a front elevation of a clapper box showing the cutting toolsecured therein;

Fig. 2 is a side elevation of the same showing a beveled conical guidein dotted lines;

Fig. 3 is a plan View of a clapper box;

Fig. 4 is a sectional view taken on a line corresponding to 4-4 of Fig.1, showing the hinged tool block in closed position;

Fig. 5 is aside elevation of the clapper box showing the beveled conicalguide in dotted lines and the hinged tool block in section as shown inFig. 4 in an open position Fig. 6 is a perspective view of our im provedclapper box with taper pin and nut for hinging the tool block thereon;

Fig. 7 is a perspective view of our improved tool block;

Fig. 8 is a perspective view of our im proved tool slide, clapper boxand tool block with a tool secured therein;

' Fig. 9 is an end elevation of our inter locking cone; 1

Fig. 10 is a side elevation of our interlocking cone; and

Fig. 11 is an enlarged perspective View of the collar.

In the preferred construction of our device we provide tool block 1pivotally connected to clapper box 2 by hinge 3 comprising tapered pin lextending through bearings 5 in bosses 5 integral with the tool blockand through the bearing 6 in boss 6 integral with the clapper box. Thetool block is provided with mechanism for securing tool 7 in the toolblock comprising bars 8 extending transversely of the tool block andeach having a hole at 9 near the The faces of tool engaging plates 14:are preferabl knurled or otherwise roughened to secureiy hold tool 7.The tool block is provided with channel 15 on the inner surface thereofand snugly fits rabbet- 16 integral with clapper box 2 for the purposeof eliminating sidewise movement of the tool block when in closedposition. For addi tional security against sidewise movement of the toolblock as well as movements in other directions and for the purpose oflessening the strain on tapered pin 4; interlocking cone 1? havingreduced cylindrical butt 18 snugly fits into circular recess 19 in theinner portion of tool block 1 and is secured therein against outwardmovement by screw 20 threaded in a hole at 21 in the tool block. Theouter conical portion 22 of interlocking cone 17 snugly fits into a likeshaped conical hole at 23 of the clapper box when the tool block is inclosed position. To permit positioning tool 7 at any desired angle withthe planer table, clapper box 2 is pivotally connected to tool slide 2%by stud 25 received in a hole at 20 and is threaded in a socket at 27 inthe tool slide. Collar 28 around stud 25 cooperates with said stud 25 informing the pivotand in preventing lateral movement of the clapper boxby being comhinedly received in recesses 29 and 30, respectively, ofclapper box 2 and tool slide 2i and is designed for a snug fit therein,Collar 28 relieves stud 25 from any strain. A manually operated handwheel 31 fixed to worm gear 32 meshing with are rack 33 on the upperportion of clapper box 2 provides means for movement of the clapper boxon its pivot formed by stud 25. The clapper box is secured againstundesired movement on its pivot 25 by nuts 34 threaded to bolts 35 fixed1n tool slide 24 and extending through arc slots36 in the clapper box.Tightening nuts 34 engage the same with the clapper box, therebysecuring it in contact with support 24. It is obvious that tool slide24: is received by tool actuating member of ametal planer.

An important advantage of our invention is that a heavy cut, leaving asmooth surface, may be made without the usual chatter and without dangerof breaking the tool while at the same time eliminating or reducing thenumber of operations required to do a given amount of work.

It is apparent that our invention is capable of some modificationwithout departure from its scope or spirit as defined in the claims.

Whatwe claim as new and desire to secure by Letters Patent is:

1. In a planer, the combination of a tool slide having a recess therein,a pivot mounted in said tool slide, concentric with said recess, aclapper box having a recess and a socket therein and connected to saidpivot, a tool holder and means adapted to stabilize said tool holdercomprising a channel on the inner surface thereof adapted to form a firmjoint with said clapper box, an interlocking cone fixed to said toolholder and adapted to snugly fit in said socket, said pivot comprising alongitudinal )in having a collar thcre'around and com inedly cooperatingwith said recesses, substantially as and for the purposes set forth.

In a planer, the combination of a tool slide having a worm gear securedthereto and having a pivot mounted therein and having a recess therein,and having a bolt fixed thereto, a clapper box havingan arced rack andan arccd slot at the upper portion there of and having a recess and asocket therein and having a rabhet thereon and connected to said pivot,said arced rack and said worm gear meshed, said bolt extending throughsaid arccd slot, :1 tool holder having a circular recess therein and achannel adapted to cooperate with said rabbet and hinged to said clapperbox, an interlocking cone secured in said circular recess and adapted tosnugly fit in said socket, a manually actuated hand wheel adapted torotate said worm gear for swinging said clapper box at any desiredangle, a collar around said pivot and cooperating with said recess forlessening the strain on said pivot and means for retaining said clapperbox in any desired angle relative to said tool slide comprising a nutthreaded to said bolt.

3. In a planer, a tool slide having a recess therein, a clapper boxthereon having a hole therethrough with a recess on its outer sidearound said hole and with a recess of larger diameter on its inner sidearound said hole in registry with said first-mentioned recess, a collarmounted in said registering recesses and a pivot-stud extending throughsaid hole and collar and screwed into said tool slide and having itshead fitting in said outer recess and bearing against a flange betweenthe recesses in the clapper box whereby said clapper box is pivotallymounted and held on said tool slide and the screw of said pivotstud isrelieved from side or lateral thrust.

CHARLES GEORGE JOHANNESMEYER. ALFRED a. McCANN.

